The term 'Cartoon Opossum' refers to the character Pogo, a cartoon opossum created by Walt Kelly in 1948. Pogo is a wise and gentle creature who lives in the Okefenokee Swamp and is known for his philosophical musings. He is often accompanied by his friends Albert Alligator, Churchy LaFemme, and Beauregard Bugleboy. Pogo is a beloved character who has been featured in comic strips, books, and television shows.